var xmlHttp;
function showHint(str)
{
	if (str.length==0)
  	{ 
  		document.getElementById("txtHint").innerHTML="";
  		return;
  	}
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
  	{
  		alert ("Browser does not support HTTP Request");
  		return;
  	} 
	var url="gethint.php";
	url=url+"?q="+str;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 

function stateChanged() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 	{ 
 		document.getElementById("txtHint").innerHTML=xmlHttp.responseText;
 	} 
}
function GetXmlHttpObject()
{
	var xmlHttp=null;
	try
 	{
 // Firefox, Opera 8.0+, Safari
 		xmlHttp=new XMLHttpRequest();
 	}
	catch (e)
 	{
 // Internet Explorer
 	try
  	{
  		xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  	}
 	catch (e)
  	{
  		xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  	}
}
return xmlHttp;
}